Vacuum-can



Patented Sept. '20, 1921.

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Aouter casing 1 UNITED STATI-,1sY PATENT ori-Ica STELLA C. LARSEN,'0F WASHINGTON, DISTRICT 0F COLUMBIA1 ASSIG'NY'OR O F ON- HALF TO JOHN W. RUST,

0F FAIRFAX, VIRGINIA VACUUM-CAN.

To all whom t may concern:

Be it known that I, SrnLLA C. LARsnN, a citizen of the United States, residingv in the city of Washington, in the District of Columbia, have invented certain new and useful Improvements in a Vacuum-Can, of which the following is a. specification.

This invention relates to shipping cans for milk. l y y The object of the invention is to provide a milk shipping can of the thermos or vacuum type which is simple in construction, cheap to manufacture and which will ef fectively retain its contents for twenty-four hours or more at the temperature at which it is placed in the can.

Another object is to provide a. can of this character having combined spacingV and packing elements for holding the inner and outer casings in operative position relatively to each other.

Vith these and other objects in view, the invention consists'in certain novel features of construction as hereinafter shown and described, and then specifically pointed out in the claim, and in the drawings illustrative of the preferred embodiment of the invention.

' In the accompanying drawing:

Figure 1 represents a vertical section through the outer member of the can with the inner memberl shown in side elevation ang having parts broken out and in section, an

Fig. 2 is a transverse section taken on the line 2.2 of Fig. 1.l

In the embodiment illustrated, the can constituting this invention comprises an preferably constructed of corrugated metal with an inner casing" 10 conforming in shape thereto and arranged therein, said casing bein of a size to provide a' s shown these casings are integrally connectedaty their neck portions but obviously .they may beseparably` connected.

The outer' casing 1, has a rounded bottom 2 and is provided at its lower end with a base flange 3 toform a support for the can, t

the lower edge of said; flange being here shown flush with the central portion of the bottom. This casing 1 has a. reinforclng band 4 at its upper end provided at its upper edge with a downturned flange 5 to form a Specification of Letters Patent.

-hand grip to facilitate ratenteasept. '20 1921.

Application ledseptember 16, 1920. Serial No. 410,699.

handling of the can. The neck 6 of the casing from the dome of the top 1a. thereof and is externally threaded as shown at T for connection with the threaded cap 17 which forms a closure for the can.

The casing 1. is provided on its inner face with a plurality of longitudinally spaced annular ribs 9 which are designed to reinforce the casing andto form one member of a supporting seat for combined packing and spacing rings 13 which fit between the casings and rest on the ribs 9 and on similar ribs 12 carried by the inner casing 10 and arranged directly opposite the ribs 9 as is shown clearly in Fig. 1. Any desired number of these combined packing rings and spacers 13 may be emplo ed, four being here shown and they are pre erably composed of cork or other suitable. material.

Arranged between the bottoms of the iriner and outer casings are two annular spacers Y14:' and 15 concentrically arranged and positioned suitable distances apart to provide proper supports for the inner casing and to form vacuum chambers between them..

Another vcombined packing Y ring and spacer is arranged between the tops o f the .y

two casings at the base of the neck portions thereof as is shown clearly in Fig. 1.

From the above description it will be obvious that the rings 13 are of a width to completely fill the space between the casings forming vacuum chambers between them and also operating to hold the two casings against llateral movement relatively to each other.

A can constructed as herein shown and described while very slmple will operate 'ef-- a-ges. That I claim is: v

A canof the class described comprising inner and outer casings connected to form a vacuum space around the inner casing a with combined packing and spacing rings 1 projects upwardlyv i arranged at intervals between them and enoirclingthe inner casing, said casings having oppositely disposed reinforcing periphlA erally arran ed annular ribs on the upper faces of whlch said rings are Seated, said rin s being of uniform width throughout an corresponding in width to the distance between the casings to adapt them to operate as spacers and formI Vacuum chambers be.- tween them. p *A In testimony whereof, I aix my signature hereto.

STELLA C. LRsiszNA 

